Signal.



W. SPARKS.

slcNAL. APPLICATION FILED NOV. I3. IBIS.

Patented Feb. 6, 1917.

um @In 1 l f l n f l L Y o ,frz/1114711514115:

UNITED sTATEs PATENT oEEroEIt WILLIAM SPARKS, OF JACKSON, MICHIGAN, ASSIGNOR TO THE SPARKS-'WITI-IINGlN COMPANY, OF CLEVELAND, OHIO, A CORPORA'TT' 0F Pfl-H0.

Specification of Letters Patent.

lljatented Feb. .6, 1.91 '1.

Application flied November 1S, 1915. Serial No, 62,247.

To all 'whom it may concern.'

Beit known that I, `WILLIAM Simens, a citizen of the United States of America, and resident of Jackson, in the county ofJack- 5`son, in the State of Michigan, have invented new and useful Improvements in Signals, of

which the following, taken in connection with the accompanying drawings7 is a full, clear, and exact-descriptions LQ. This invention relates to certain improvements in diaphragm signals of the motordtriven type.

The primary object of the invention is to provide in a signal having the drivngfshaft Ltg, disposed parallel withthe diaphragm means for varying the degree of overlap of the actuating1 cam and the-wear-piece on the dia phi-agro, and to accomplish this adjustment lyprov'idingisimple means for adjusting the 2m diri-ving shaft longitudinally of its axis@ @tller bjects and:` uses will appear from theV following description, tal'ren inconnection withv the; accompanying drawings, in Whichl 215; Figure-lis a-.si'deelevation of a-signal em- 'hodyingfthe invention herein. Fig; 2 is a, vertricalcrosssection of the' saine. Fig 3 is ai vertical cross section similar to Fig. 2 of a slightly modilied form of supporting and av-inclosingfmeans furthe motor and the actuating parts.- Fig. et illustrates a modified formoff wear-piece, particularly adapted fory use Withithe` form of actuating cam here# i'n shown. The invention, as shown, comprises a resonator `-1 engaged with and supported by afront case section -2-, between which case'section.and* a rear case section a suitable diaphragm -4-l is supportedin 40"; any. usual and. well-known. manner; the two oasefsectionsandthe diaphragm are rigidly secured in. proper relative position by I'n-tlie ormshown in Figs. l and '2, the

453 man case section is provided .with rearwardly projecting-' apertured4 ears -6- adapted to receive between, them a pair of spaced brackets 7i-having intles adapted to be V journaled in the apertures in said ears -6- 250.,lto rotatably associate the parts.

The brackets -7- are preferably formed integral with and'projeet upwardly from a n elongated cylindrical bearing -8-5 for the drivingyshaft, said bearing terminating at its lower end in a. fiat and preferably substantially circular plate 9 secured to one end of an electric motor ---l0- in any suitable manner, as by screws -ll-, and preferably the plate 9- und the adjacent end of the motor have interengaged portions for assisting in preventing relative .movement of the parts.

The motor is of the usual. construction emarmature -l-, armature shaft -15-, commutator -i6-, andthe usual andordlnary brushes not indicated. The rear end 'or' the motor is closed hy a removable cap *117-3 in which the rear end of the armature shaft isjournalcd, and preferably this hearing' is internally threaded for the reception of an adjustable threaded screw -1S and preferably carrying a rotary ball 19- forming an adjustable end thrust, bearing for the armature shaft of the motora.. This hearing may be held in any desired posiion of adjustment by the nut -20-. Themotor shaft -15- extends upwardly through'the hea1ing-*-, and at a point adjacent and between the brackets `7 is providedwit-h a suitable actuating cam --lm secured upon thc upper end of the armature shaftsecured to the diaphragm, preferably adjacent the center thereof.` and .in the form shown, the cam provided with actuating project-'ions curved in a plane traversing the plane orotation of the cani'so that the projections are ohliquely disposed with respect to the plane of the diaphragm, and by raising and lowering the earn throughthc medium of end thrust hearing '-1`8-, the degree of overlap of projections` of the cam upon the wear-piece `2f may he lvaried, (lue t0 the fatti; that SNCll movonmnt eglises. the wear-piece to Contact with different points along the ohliqoely disposed projet:r tions of the cam. Preferably hc motor l0 is provided with u. .sheet imftal, cover -24- secured to its tower ein] for inclosi'zg` the cap 17M aijid nearing --l" In Fig. 3 the dispos1t1on of the cam and wear-piece is identical with that disclosed in the former figures and the movement of the shaft -15-- longitudinally of its axis accomplishes the identical adjustment heretofore described. In this illustration, however, the rear case section -3-- is shaped to inclose the cam -22- and is provide with transverse apertured portions -25l and I -26-, the latter being internally threaded for the reception of the externally threaded 'bearing '8-, and the proper rigidity of the parts is attained by locking nuts Q7- and 2S- positioned upon opposite sides of the portion 2B- Although in Figs. 1 and 2 a certain freedomof movement exists in the armature shaftrelative to the motor case, et With the perpendicular disposition of tie shaft gravity tends to hold 1t in contact with the end thrust bearing. Further the oblique disposition of the cam teeth likewise holds the motor shaft in constant contact with the end thrust bearing H18-, due to the thrust exerted upon the' cam by the Wear-piece v 2B- In Fig. 3, however, an end' thrust bearing is provided which deprives the motor shaft of any freedom of movementlongitudinally of its axis, andby which thel motor shaft may be positively moved in either direction. In this illustration the cap '-17- is provided with an internally threaded bearing for the Areception of a sleeve -29. 1 I

The inner end of the sleeve -29 li's provided with an internal flange 3G- lforming a seat or shoulder for coperative engagement 'with a stepped member -3'1- mounted upon the end of the armature shaft 15- adjacent the commutator ,-16- and held iii' place by a suitable locking nut 1 The rearV portion of the sleeve *29- is internally threaded for the reception ofrset screw 33- carrying a rotary ball -34-, which ball, in like manner as the ball -19-, in adjusted position of set 4screw 433-- bears against the adjacent end of armature shaft -15- and forms an end thrust bearing therefor.

It will be readily. apparent that the set screw 3B- may. be adjusted to account for diiferent lengths of armature shafts and L for variance in the 4size of parts, and when the screw is properly adjusted withv respect to the shaft, the sleeve -29- may beadjusted through its bearing to positively raise and lower the shaft -15, and to positively and rigidly hold said shaft in any desired position of adjustment of the cam 22- with res ect to wear-piece -23-. The sleeve may e provided with-a locking nut -35- for assisting in holding the sleeve in any desired position of adjustment.

Although I have -shown and described particular constructions and'methods of operation as ada ted for accomplishing the end 1n view, I o not desire t'o limit myself to any particular construction or any specific method of operatiom'as many changes f may be made in the forni of the parts and in the detailsof construction and operation of shaft disposed substantially parallel Wit the diaphragm, a roto'r carried b'y said driving shaft, said rotor'having teetl1. rejecting radially therefrom for` contact Witli said impulse-receiving portion, and-'means for' movd ing said rotor 1n a direction st'ihsta'ntially' parallel with the diaphragm to vary the de gree of overlap of said teeth upon-said imd pulse-receiving portion in a direction radis ally of the axis of rotation ofthe rotor.

- 2. In V a signal, a diaphragm having 'a wear-piece thereon, Aa motor havin" its arma ture shaft Vdisposed substantial y parallel with the diaphragm, a cam upon thermotor shaft, said cam having its actuating portions disposed obliquely to the axis of rotation ofA the cam, and means for adustng thearmature shaft longitudinallyo its axis.

3. In a signal, a diaphragm having an impulse-receiving ortion",` a rotary drivin' shaft disposed su antially parallel wit the diaphragm, a rotor carried by said driving shaft, said rotor having teeth rejecting.

radially therefrom forcontaot wit said im pulsereceiving portion, and means for mov;

ing said shaft longitudinally Vto vary thedei axis of rotation of the cam, means for rotat' ingr the cam, and means for movin the cam axially to vary the degree of over ap-of the cam projections on said wear-piece.

5,. In a signal, a diaphragm having a wear-piece thereon, a driving shaft disposed r substantially parallel with the plane of the diaphragm, a cam mounted on said shaft for coperatlve engagement with said wearpiece, said cam having its Vactuating projections obliquely disposed with respect to the axis of said shaft, means for moving the cam axially to vary the degree of overlap of said projections upon said wear-piece.

and adapted for' c-operative` engagernentf4 With sa1d wear-piece, said cani havin `-atuat1ng projections l obliquely LUS disp'oed Withreepeet to"the 4axis of said, shaft,A and means for nier; ng said 'shaft axially to vary :the degree; of overlap of the cam proj actions on said pteaapiece.

p'lilserefeiving portion, a rotary electr-iq' motor haring its armature shaft disposed isubtorb ollnted 4on Said shaft; means for polil( f ,.tively: reiproeatingSaid shaft, relatlvely to the body of thiegxitor to reciprocate Said rotor, the i,i'eoiprocationfpf ,saidrotor varying the deg-Tee of overlap of said rotor on said impuls y.receiving portion.

8. ln a sigiiaha diaphrgm having;r an im- Inillse-reoeiving portion, a rotary eleetric motor having:r its armature shaft disposed Substantially parallel with thediaplnagm, a rotor mounted on said shaft, anaend thrust bear- `ing for.

both directions.: independently oi' the body of themotor to reciprocate said rotor, the re- Y, i l l y 1. lnia signal, a diaphifagrn having an 1inj parallel 'with'gthe diaphragm, amo-"-4 sairfi shaft adaptedv to2 poeit'iyelyfl Hanni: longitudinally oit axis in f torliaving a driving shaft disposed Substantially parallel with the diaphragm, a rotor mounted on said shaft, an end thrust bearing for said vshaft adapted to liositively move the eamo longitmlinally of its axis; in both 'directions relatively to and independent of'the body of themotor to reriprocate said rotor, the reciiprocalion of said rotor varying the degree ol overlap of said rotor on said .ilnpn[se-receiving portion.

10. In aJeam-aetnated diaphragm signal, aV diaphraj'm haring an irnp|llse-reoeiving portion, a rotary cani having radial projections-merging into axial projections, a pivotally earried rotary shaft 'upon which said am is mounted, said shaft adapted to be oved about said pivot to briner different .ptii'tifons'lot' said projections into contact 'wi .lvsai d ilnpuls'e-reeeiving portion upon ro- 

